US4768472A - Cooling system for an internal combustion engine - Google Patents

Cooling system for an internal combustion engine Download PDF

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Publication number
US4768472A
US4768472A US07/017,451 US1745187A US4768472A US 4768472 A US4768472 A US 4768472A US 1745187 A US1745187 A US 1745187A US 4768472 A US4768472 A US 4768472A
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US
United States
Prior art keywords
ring
fan
boss
shroud
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/017,451
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English (en)
Inventor
Masaharu Hayashi
Masato Itakura
Kenji Shindo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Assigned to AISIN SEIKI KABUSHIKI KAISHA reassignment AISIN SEIKI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAYASHI, MASAHARU, ITAKURA, MASATO, SHINDO, KENJI
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Publication of US4768472A publication Critical patent/US4768472A/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans

Definitions

  • the present invention relates to a cooling system for an internal combustion engine, in which a ring is integrated around a plurality of fan blades.
  • a typical cooling fan includes a boss 1 coupled to an input member, and a plurality of fan blades projecting radially outwardly from the outer periphery of the boss 1 as shown in FIGS. 12 and 13.
  • cool air passes through a clearance 4 between the tips of the blades 2 and a shroud 3 as best seen in FIG. 12.
  • This counterflow of air A causes a reduction in the volume of cool air.
  • a spiral flow of air B is created around the tips of the blades 2 as best seen in FIG. 13. This results in the occurrence of undesirable noise.
  • Japanese utility model laid-open publication No. 52/11203 discloses an improved cooling system wherein a cooling fan is surrounded by a ring 5 (see FIG. 14).
  • the disclosed cooling system particularly those illustrated in FIGS. 15(A) and 15(B), is easy to manufacture and install.
  • the ring 5 has a small curvature from a cylindrical portion to a portion of maximum diameter, the maximum diameter portion being 1.0 to 1.3 times greater than the diameter of the cylindrical portion.
  • the shroud 3 overlaps the cooling fan, with or without a ring, by half of, or equal to the axial width of the fan.
  • a radiator In the design of a cooling system, a radiator is first so sized as to dissipate a substantial amount of heat. Then, a specific type of cooling fan is implemented to provide a substantial flow of air through the radiator. With the size of the radiator fixed, a fan with a ring of a bellmouth form is 10 to 20% smaller in diameter than a fan with ring in general form. It has experimentally found that the former provides a flow of air only 58 to 77% of that of the latter. In order for the former to provide as much a flow of air as the latter, rotational number of the former must be 1.3 to 1.7 times greater than that of the latter. However, this results in a substantial increase in the noise. It should also be noted that mounting of the former to a vehicle body is cumbersome.
  • a cooling system for an internal combustion engine comprising a fan having a boss coupled to an input member, a plurality of blades projecting substantially radially from said boss and a thin cylindrical ring coaxial with said boss and integrated around said blades, and a shroud arranged around said fan with a clearance therebetween, said ring having a cylindrical portion in its intake side and being bent, with a curvature, outwardly toward its exhaust side, and the relative arrangement of the fan with the ring and the shroud being such that a maximum diameter of the ring/(the diameter of the cylindrical portion of the ring+the clearance between the ring and the shroud ⁇ 2) is in the range of 0.97 to 1.04, that the curvature/the diameter of the cylindrical portion of the ring is in the range of 0.05 to 0.08, and that an overlapping length of the shroud with the ring/an axial width of the ring is in the range of 0.17 to 0.70.
  • the fan blades are so arranged that a reference line extending along front two-fifths of the blade section is bent in such a direction that the blades are rotated, and is also bent toward the intake side of the fan between the boss and the ring.
  • FIG. 1 is a front view of a cooling system according to the present invention
  • FIG. 2 is a side view, partly in section, of the cooling system shown in FIG. 1;
  • FIG. 3 is a view similar to FIG. 2, showing the dimension of a cooling fan
  • FIG. 4 is an enlarged side view, partly in section, of the fan
  • FIG. 5 is a graph showing noise levels in relation to the value of D /(D+2C);
  • FIG. 6 is a view similar to FIG. 4, but showing the shape of a ring when the value of R/D 1 is small;
  • FIG. 7 is a view similar to FIG. 7, but showing the shape of a ring when the value of R/D 1 is large;
  • FIG. 8 is a graph showing noise levels in relation to the value of R/D 1 ;
  • FIG. 9 is a graph showing noise levels in relation to the value of t/B.
  • FIG. 10 is a graph showing noise levels in relation the volume of air
  • FIG. 11 is a graph showing noise levels in relation to frequency
  • FIG. 12 is a diagrammatic view showing a counterflow of air around the blade of a conventional fan
  • FIG. 13 is a view similar to FIG. 12, but showing a spiral flow of air around the blade of a conventional fan;
  • FIG. 14 is perspective view of a conventional fan with an integral ring
  • FIGS. 15(A) and 15(B) are side views of the fan shown in FIG. 14, respectively, showing a typical flow of air through the fan.
  • an engine 6 has a crankshaft (not shown), rotary motion of which is transmitted through a belt 7 to a pulley 8 and an input shaft of a viscous fluid joint 9.
  • This rotary motion causes a fan 10 to rotate in a predetermined direction.
  • the fan 10 is surrounded by a right cylindrical tubular shroud 11 with a clearance C therebetween. This clearance serves as an air duct.
  • the fan 10 is to provide a flow of air through a radiator 12 and then direct the air in a direction outwardly and rearwardly thereof, as shown in by the arrow C.
  • a ring having an outwardly bent peripheral edge.
  • a significant feature of the present invention resides in the relative arrangement of the fan 10 with the integral ring 13 and the shroud 11. More specifically, in FIG. 3, the value of D 2 /(D 1 +C ⁇ 2) is established in the range of 0.97 to 1.04, the value of R/D 1 is established in the range of 0.05 to 0.08, and the value of t/B is established in the range of 0.17 to 0.70.
  • the fan with the integral ring is more effective in reducing noise than a conventional fan of 410 in diameter.
  • a reference line extends along the front two-fifths of blade section. This reference line is bent in such a direction that the blades are rotated, and is also bent toward the intake side of the fan between the boss and the ring.
  • This particular type of cooling fan is called "bend fan," and makes less noise than a conventional fan with a straight reference line.
  • FIG. 5 shows noise levels in relation to the value of D 2 /(D 1 +2C) in a typical cooling system. As is clear from FIG. 5, the noise levels are substantially constant where the value of D 2 /(D 1 +2C) is greater than 0.97. Although an upper limit of the value of D 2 /(D 1 +2C) should be determined in accordance with the type of a motor vehicle to which a cooling system is mounted, the upper limit is experimentally established to be 1.04 in the preferred embodiment of the invention.
  • FIG. 6 shows that if the value of R/D 1 is small, then cool air may pass separately through opposite sides of the ring 13, or may impinge the ring 13. This results in a lesser volume of air and greater noise.
  • the value of R/D 1 is large, then an inclined flow of air is restricted as shown in FIG. 7. Consequently, the air impinges an engine block or related parts. This causes an increase in interference noise, an increase in resistance to air in a blower system, and a reduction in the volume of air.
  • FIG. 8 shows noise levels in relation to the value of R/D 1 . As is clear from FIG. 8, the fan makes less noise when the value of R/D 1 is in the range of 0.05 to 0.08.
  • the value of t/B has less influence on the noise levels. This is due to the fact that air flow within the ring is rarely affected under the influence of the shroud.
  • the value of t/B is established in the range of 0.17 to 0.70. This arrangemnt enables the fan to reduce the noise a substantial amount.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US07/017,451 1986-02-21 1987-02-24 Cooling system for an internal combustion engine Expired - Fee Related US4768472A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61036870A JPS62195494A (ja) 1986-02-21 1986-02-21 内燃機関用冷却装置
JP61-036870 1986-02-21

Publications (1)

Publication Number Publication Date
US4768472A true US4768472A (en) 1988-09-06

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Application Number Title Priority Date Filing Date
US07/017,451 Expired - Fee Related US4768472A (en) 1986-02-21 1987-02-24 Cooling system for an internal combustion engine

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US (1) US4768472A (ja)
JP (1) JPS62195494A (ja)
DE (1) DE3705689A1 (ja)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4900229A (en) * 1989-05-30 1990-02-13 Siemens-Bendix Automotive Electronic Limited Axial flow ring fan
US4915588A (en) * 1989-06-08 1990-04-10 Siemens-Bendix Automotive Electronics Limited Axial flow ring fan with fall off
US5183382A (en) * 1991-09-03 1993-02-02 Caterpillar Inc. Low noise rotating fan and shroud assembly
US5259726A (en) * 1992-06-26 1993-11-09 Storage Technology Corporation Rotating fan guard
US5701854A (en) * 1994-10-26 1997-12-30 Behr Gmbh & Co. Axial fan for an internal combustion engine
US5881685A (en) * 1996-01-16 1999-03-16 Board Of Trustees Operating Michigan State University Fan shroud with integral air supply
US6209627B1 (en) * 1997-10-08 2001-04-03 Honda Giken Kogyo Kabushiki Kaisha Cooling device for radiator of motorcycle
GB2358677A (en) * 2000-01-20 2001-08-01 Gate Spa Fan for a vehicle radiator with fins extending from a shroud ring
WO2001079704A2 (en) * 2000-04-14 2001-10-25 Borg Warner Inc. Cooling fan
EP1959111A2 (de) * 2007-02-14 2008-08-20 Behr GmbH & Co. KG Kühlsystem für ein Kraftfahrzeug
USD734845S1 (en) * 2013-10-09 2015-07-21 Cooler Master Co., Ltd. Cooling fan
USD736368S1 (en) * 2013-10-09 2015-08-11 Cooler Master Co., Ltd. Cooling fan
US9551356B2 (en) 2013-10-04 2017-01-24 Caterpillar Inc. Double bell mouth shroud
CN106687692A (zh) * 2014-09-22 2017-05-17 马勒国际公司 特别是用于机动车辆内燃机的用于输送冷却空气的轴流风扇
US20190040873A1 (en) * 2016-02-24 2019-02-07 Mitsubishi Electric Corporation Air-sending device and air-conditioning apparatus using the same
USD860427S1 (en) 2017-09-18 2019-09-17 Horton, Inc. Ring fan

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235986C2 (de) * 1992-10-24 1994-09-29 Man Nutzfahrzeuge Ag Axialgebläse für den Kühler einer wassergekühlten Brennkraftmaschine
US5996685A (en) * 1995-08-03 1999-12-07 Valeo Thermique Moteur Axial flow fan
US5755557A (en) * 1995-08-03 1998-05-26 Valeo Thermique Moteur Axial flow fan
JP4000794B2 (ja) * 2001-07-25 2007-10-31 株式会社デンソー 軸流ファン
DE102007036304A1 (de) * 2007-07-31 2009-02-05 Behr Gmbh & Co. Kg Vorrichtung zur Kühlung eines Motors
EP2410210B1 (de) * 2010-07-22 2013-03-27 Siemens Aktiengesellschaft Getriebe für industrielle Anwendungen
PL2410209T3 (pl) * 2010-07-22 2013-08-30 Siemens Ag Urządzenie chłodzące dla przekładni
DE102010038950A1 (de) 2010-08-05 2012-02-09 Behr Gmbh & Co. Kg Axiallüfter
JP6829672B2 (ja) * 2017-09-14 2021-02-10 日立建機株式会社 建設機械の冷却ファン
WO2024089808A1 (ja) * 2022-10-26 2024-05-02 三菱電機株式会社 軸流ファン、送風機、及び、空気調和機

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321931A (en) * 1965-05-03 1967-05-30 Whirlpool Co Fan structure
US3433403A (en) * 1966-12-16 1969-03-18 Lau Blower Co Fan inlet shroud
US3842902A (en) * 1973-07-05 1974-10-22 Hayes Albion Corp Labyrinthian fan
JPS5211203A (en) * 1975-07-17 1977-01-28 Ig Gijutsu Kenkyusho Kk Refractory grain
US4329946A (en) * 1979-10-09 1982-05-18 General Motors Corporation Shroud arrangement for engine cooling fan
US4505641A (en) * 1980-03-07 1985-03-19 Aisin Seiki Kabushiki Kaisha Cooling fan for internal combustion engine
JPS6058305A (ja) * 1983-09-02 1985-04-04 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング ボ−ル箱包装機内のパンフレツト供給装置
US4514140A (en) * 1980-08-05 1985-04-30 Hans List Axial fan
US4684324A (en) * 1985-08-02 1987-08-04 Gate S.P.A. Axial fan, particularly for motor vehicles

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5211203B2 (ja) * 1975-02-20 1977-03-29
DE3304297A1 (de) * 1982-03-15 1984-03-15 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Axialgeblaese, insbesondere fuer kuehler einer wassergekuehlten brennkraftmaschine
JP3173853B2 (ja) * 1991-08-02 2001-06-04 株式会社エコ・トゥエンティーワン 熱電変換素子
JP2882130B2 (ja) * 1991-11-12 1999-04-12 日本電気株式会社 半導体装置の製造方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321931A (en) * 1965-05-03 1967-05-30 Whirlpool Co Fan structure
US3433403A (en) * 1966-12-16 1969-03-18 Lau Blower Co Fan inlet shroud
US3842902A (en) * 1973-07-05 1974-10-22 Hayes Albion Corp Labyrinthian fan
JPS5211203A (en) * 1975-07-17 1977-01-28 Ig Gijutsu Kenkyusho Kk Refractory grain
US4329946A (en) * 1979-10-09 1982-05-18 General Motors Corporation Shroud arrangement for engine cooling fan
US4505641A (en) * 1980-03-07 1985-03-19 Aisin Seiki Kabushiki Kaisha Cooling fan for internal combustion engine
US4514140A (en) * 1980-08-05 1985-04-30 Hans List Axial fan
JPS6058305A (ja) * 1983-09-02 1985-04-04 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング ボ−ル箱包装機内のパンフレツト供給装置
US4684324A (en) * 1985-08-02 1987-08-04 Gate S.P.A. Axial fan, particularly for motor vehicles

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4900229A (en) * 1989-05-30 1990-02-13 Siemens-Bendix Automotive Electronic Limited Axial flow ring fan
US4915588A (en) * 1989-06-08 1990-04-10 Siemens-Bendix Automotive Electronics Limited Axial flow ring fan with fall off
US5183382A (en) * 1991-09-03 1993-02-02 Caterpillar Inc. Low noise rotating fan and shroud assembly
US5259726A (en) * 1992-06-26 1993-11-09 Storage Technology Corporation Rotating fan guard
US5701854A (en) * 1994-10-26 1997-12-30 Behr Gmbh & Co. Axial fan for an internal combustion engine
US5881685A (en) * 1996-01-16 1999-03-16 Board Of Trustees Operating Michigan State University Fan shroud with integral air supply
US6543523B2 (en) 1997-10-08 2003-04-08 Honda Giken Kogyo Kabushiki Kaisha Cooling device for radiator of motorcycle
US6209627B1 (en) * 1997-10-08 2001-04-03 Honda Giken Kogyo Kabushiki Kaisha Cooling device for radiator of motorcycle
GB2358677A (en) * 2000-01-20 2001-08-01 Gate Spa Fan for a vehicle radiator with fins extending from a shroud ring
EP1795761A1 (en) * 2000-04-14 2007-06-13 Borgwarner, Inc. Cooling fan
EP1793125A1 (en) * 2000-04-14 2007-06-06 Borgwarner, Inc. Cooling fan
WO2001079704A2 (en) * 2000-04-14 2001-10-25 Borg Warner Inc. Cooling fan
KR100754336B1 (ko) * 2000-04-14 2007-08-31 보그워너 인코포레이티드 냉각 팬
WO2001079704A3 (en) * 2000-04-14 2002-04-04 Borgwarner Inc Cooling fan
EP1959111A2 (de) * 2007-02-14 2008-08-20 Behr GmbH & Co. KG Kühlsystem für ein Kraftfahrzeug
EP1959111A3 (de) * 2007-02-14 2010-03-24 Behr GmbH & Co. KG Kühlsystem für ein Kraftfahrzeug
US9551356B2 (en) 2013-10-04 2017-01-24 Caterpillar Inc. Double bell mouth shroud
USD734845S1 (en) * 2013-10-09 2015-07-21 Cooler Master Co., Ltd. Cooling fan
USD736368S1 (en) * 2013-10-09 2015-08-11 Cooler Master Co., Ltd. Cooling fan
CN106687692A (zh) * 2014-09-22 2017-05-17 马勒国际公司 特别是用于机动车辆内燃机的用于输送冷却空气的轴流风扇
US10508652B2 (en) 2014-09-22 2019-12-17 Mahle International Gmbh Axial fan for conveying cooling air, in particular for an internal combustion engine of a motor vehicle
US20190040873A1 (en) * 2016-02-24 2019-02-07 Mitsubishi Electric Corporation Air-sending device and air-conditioning apparatus using the same
US10890194B2 (en) * 2016-02-24 2021-01-12 Mitsubishi Electric Corporation Air-sending device and air-conditioning apparatus using the same
USD860427S1 (en) 2017-09-18 2019-09-17 Horton, Inc. Ring fan

Also Published As

Publication number Publication date
DE3705689A1 (de) 1987-08-27
JPS62195494A (ja) 1987-08-28
DE3705689C2 (ja) 1990-05-03

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